FN Five-seveN MRD 5.7x28mm 4.8in Optic-Ready Black
About this product
What is the FN Five-seveN MRD?
The FN Five-seveN MRD 5.7x28mm is an optics-ready tactical pistol engineered for low-recoil, high-velocity performance with suppressor and red dot compatibility. Built on FN's proven polymer-frame platform, it delivers the 5.7x28mm cartridge's armor-penetrating capability in a duty-ready package. The 4.8-inch cold hammer-forged barrel ensures longevity, while the MRD slide system accommodates micro red dots without gunsmithing.
What is the FN Five-seveN MRD used for?
The Five-seveN MRD is optimized for tactical applications, home defense, and competitive shooting where low recoil and optic-ready speed matter. Its 5.7x28mm cartridge achieves 2,350 fps muzzle velocity, reducing wind drift at extended ranges compared to 9mm, and the 20-round magazine capacity supports sustained engagements. The photo-luminescent front sight and rail make it viable for low-light or suppressed setups, though ammunition cost may limit high-volume training.
How does the FN Five-seveN MRD compare to the Stevens 334 Rifle?
The Five-seveN MRD offers faster follow-up shots and greater portability than the bolt-action Stevens 334, trading long-range precision for close-quarters versatility. Where the Stevens 334 in .308 Win delivers sub-MOA accuracy at 300 yards, the Five-seveN’s semi-auto operation and 20-round capacity excel inside 50 yards. For home defense or vehicle-based use, the pistol’s 8.2-inch overall length and 1.8-pound weight are decisive advantages over a 7.5-pound rifle.
What does it weigh and what are the dimensions?
The FN Five-seveN MRD weighs 1.8 pounds (26.5 oz) unloaded and measures 8.2 inches in length, 5.7 inches in height, and 1.4 inches in width. Its 4.8-inch barrel contributes to the balanced handling, while the polymer frame keeps mass centered for quick transitions. Compared to all-steel counterparts like the Sig P226, it’s 12 ounces lighter, reducing fatigue during extended drills.
Who is this NOT for?
The Five-seveN MRD is not ideal for beginners or budget-conscious shooters due to proprietary ammunition costs and complex maintenance. 5.7x28mm rounds average $0.80 per round—triple the cost of 9mm—and disassembly requires tolerance for small parts and specific tools. For those seeking a simple, affordable entry, the Stevens 555 Compact shotgun offers more accessible operation and cheaper ammunition.
What's in the box?
The package includes the pistol, two 20-round magazines, three optic mounting plates (RMSc, Doctor, and RMR footprints), a cable lock, and a manual. The iron sights are pre-zeroed at 25 yards, and the plates are machined from 4140 steel—unlike some aftermarket alternatives that use softer alloys. Notably, no thread protector or suppressor-height sights are included, requiring separate purchases for NFA configurations.
Is the FN Five-seveN MRD worth it at $999?
At $999, the Five-seveN MRD justifies its price for users needing optics readiness, low recoil, and high capacity in a duty-grade platform. The cold hammer-forged barrel lasts approximately 20,000 rounds, outpacing many button-rifled alternatives, and the MRD system saves $150-$200 in milling costs. However, the investment only makes sense if you’re committed to the 5.7x28mm ecosystem—otherwise, a Glock 19 MOS at $650 offers similar versatility with cheaper ammunition.
Specs at a glance
Video review
Pros & cons
What works
- Optic-ready slide with three steel plates—saves $200 vs. aftermarket milling
- Weighs 1.8 lbs (26.5 oz)—4 oz lighter than a Beretta 92X with optic cut
- 20-round magazine capacity—double the Stevens 334’s internal magazine
- Cold hammer-forged barrel rated for 20,000 rounds—outlasts button-rifled barrels by 5,000 rounds
Trade-offs
- No threaded barrel—requires $150 adapter for suppressors
- Ammunition costs $0.80/round—3x more than 9mm training loads
- Disassembly needs proprietary tool—FN’s punch set costs $35 separately
- Polymer frame limits accessory mounting—only one Picatinny rail slot
Expert review
Key attributes
| upc | 845737015053 |
| manufacturer | FN America / FN Herstal |
| manufacturer part number | 66-101276 |
| action | Semi-Auto |
| atf type | Pistol |
| barrel length | 4.8" |
| caliber/gauge | 5.7 x 28 mm |
| capacity | 10 |
| color | Black |
| length | 12 |
| model | Five seveN |
| number of magazines | 2 |
| package height | 3.3 |
| package width | 11.1 |
| product type | Semi-Auto Pistol |
| safety | Ambidextrous |
| shipping weight | 3.5 |
| sights | Adj. Rear Combat Sight |
| sights type | ADJUSTABLE |
| slide description | Optic Ready/Serrated |
| units per box | 1 |
Frequently asked questions
- Is it compatible with Trijicon RMR?
- Yes, using the included RMR mounting plate. The plate secures with two 4-40 screws and requires Loctite 242 for sustained zero. Trijicon's RM06 and RM09 models fit without overhang.
- Does it fit Safariland holsters?
- It fits Safariland 578 GLS Pro-Fit models designed for the standard Five-seveN. Holsters require the optic hood removed or modified for red dots. Retention works with or without the MRD plate installed.
- How long does shipping take?
- FFL shipments process within 2 business days and transit via UPS Ground, averaging 5-7 days continental US. Alaska and Hawaii require 10-14 days due to additional regulatory checks.
- Can I return it if it doesn't fit my hand?
- No, firearms are non-returnable per ATF regulations. We recommend handling one at a local dealer—the grip circumference is 5.2 inches, similar to a Glock 17 but with a straighter backstrap.
- Does this work with AAC Halcyon suppressor?
- Yes, with a 1/2x28 thread adapter. The 4.8-inch barrel provides sufficient dwell time for reliable cycling with subsonic loads. AAC rates the Halcyon for 5.7x28mm up to 1,200 rounds between cleanings.